Compositions: coating or plastic – Coating or plastic compositions – Dental
Patent
1976-04-08
1977-07-05
Morris, Theodore
Compositions: coating or plastic
Coating or plastic compositions
Dental
106241, C08L 9304, C09K 300
Patent
active
040337740
ABSTRACT:
A dental impression composition is formulated from a hydrogenated wood rosin, petrolatum, aluminum powder and talc and includes the following characteristics: (1) good plastic flow at mouth temperature to provide adequate working time with low flow at room temperature; (2) good heat and light stability which affords good shelf life with no change in flow properties; (3) flow properties not changed during extensive heating and sterilization during preparation for application on the dental tray; (4) sufficient, but not excessive adhesion strength so that the composition adheres to the tray but not to the patient's wet tissues; and (5) low thermal-expansion coefficient so that there are no dimensional changes as the impression is cooled from mouth temperature and (6) good definition of detail.
REFERENCES:
patent: 2077418 (1937-04-01), Kelly
patent: 2248999 (1941-07-01), Johnson
Johnson Paul A.
Pinkalla Hamilton A.
Fuller Henry C.
Morris Theodore
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